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1、ARTICLEINPRESSS1631-0705(02)01414-7/REVAID:1414Vol.3(0)P.1(1-25)CRAgroup2002/08/27Prn:4/11/2002;8:18F:comren1414.texby:Aup.1C.R.Physique3(2002)125Physiqueappliquée/AppliedphysicsMÉCANISMESPHYSIQUESDUNUAGEDORAGEETDELÉCLAIRTHEPHYSICSOFTHUNDERCLOUDANDLIGHTNINGDISCHARGEFundamentalp
2、rocessesinlongairgapdischargesI.Gallimbertia,G.Bacchiegaa,AnneBondiou-Clergerieb,PhilippeLalandebaIRSsrl,viaVigonovese81,35127Padova,ItalybONERA,29,av.deladivisionLeclerc,92332Châtillon,FranceAbstractThedevelopmentofatmosphericlightningisinitiatedandsustainedbytheformationinDOS
3、SIERvirginairofstreamercoronaandleaderdischarges,verysimilartothoseobservedinlaboratorylongsparks.Therefore,theexperimentalandtheoreticalinvestigationsoftheselaboratorydischargeshavebecomeoflargeinteresttoimprovethephysicalknowledgeofthelightningprocessandtodevelopself-consiste
4、ntmodelsthatcouldbeappliedtonewprotectionconcepts.Inthepresentpaperthefundamentalprocessesofthesubsequentphasesoflongairgapdischargesareanalyzed,fromthefirstcoronainceptionanddevelopmenttotheleaderchannelformationandpropagation.Foralltheseprocessessimulationsmodelsarediscussedth
5、athavebeenessentiallyderivedandsimplifiedbytheauthors,inordertodevelopsequentialtime-dependentsimulationofthelaboratorybreakdown,withbothpositiveandnegativevoltages.Thepossibilityofextendingthesemodelstothecaseofnaturallightningisdiscussedinthecompanionpaper,presentedinthissamev
6、olume.Tocitethisarticle:I.Gallimbertietal.,C.R.Physique3(2002)1–25.Ó2002Académiedessciences/ÉditionsscientifiquesetmédicalesElsevierSASstreamer/leader/lightning/simulation/model/corona/dischargeMécanismesphysiquesdesdéchargesélectriquessurdegrandsintervallesdairRésuméLaformation
7、dunéclairdébuteparledéveloppement,danslairvierge,dedéchargesélectriquesdetype«corona»et«leader»,semblablesàcellesobservéesenlaboratoirehautetensionsurdegrandsintervallesdair.Ainsi,lesétudesexpérimentaleetthéoriquedesdéchargesdelaboratoiresontunmoyenpourcomprendrelesmécanismesph
8、ysiquesmisenjeudansledéveloppementdeléclair.Cesétudeso
